Kinetis® KL4x-48 MHz, USB, Segment LCD, Ultra-Low-Power Microcontrollers (MCUs) based on Arm® Cortex®-M0+ Core

KL4x

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The Kinetis® KL4x MCU family combines ultra-low-power performance with a rich suite of analog, communication, timing and control peripherals (including a segment LCD controller) for applications like electronic scales, flow meters, smart meters, and thermostats.

  • Includes multiple flexible low-power modes, including new compute mode which reduces dynamic power by placing peripherals in an asynchronous stop mode
  • Features security circuitry to prevent unauthorized access to RAM and flash contents
  • Provides a migration path to lower and higher performance and feature integration through compatibility with other Kinetis families
  • Backed by robust development tools and software

Product Details

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Block Diagram

Kinetis L Series KL4x MCUs Block Diagram

Kinetis L Series KL4x MCUs Block Diagram
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Features

Ultra-Low-Power

  • Next-generation 32-bit Cortex®-M0+ core: 2x more CoreMark/mA than the closest 8/16-bit architecture.
  • Single-cycle fast I/O access port facilitates bit banging and software protocol emulation, maintaining an 8-bit look and feel?
  • Multiple, flexible low-power modes including new compute mode that reduces dynamic power by placing peripherals in an asynchronous stop mode
  • LPUART, SPI, I²C, ADC, DAC, LP timer and DMA support low-power mode operation without waking up the core

Memory

  • Up to 256 KB flash with 64-byte flash cache, up to 32 KB RAM
  • Security circuitry to prevent unauthorized access to RAM and flash contents
  • 16 KB ROM and built-in bootloader simplifies the effort to program MCU and allows for easy flash upgrades

Performance

  • Arm® Cortex®-M0+ core, 48 MHz core frequency over full voltage and temperature range (-40ºC to +105ºC)
  • Bit manipulation engine for improved bit handling of peripheral modules
  • Thumb instruction set combines high code density with 32-bit performance
  • Up to 4-ch. DMA for peripheral and memory servicing with reduced CPU loading and faster system throughput
  • Independent-clocked COP guards against clock skew or code runaway for fail-safe applications

Mixed-Signal

  • Up to 16-bit ADC with configurable resolution, sample time and conversion speed/power
  • Integrated temperature sensor
  • Single or differential input mode operation in order to achieve improved noise rejection
  • High-speed comparator with internal 6-bit DAC
  • 12-bit DAC with DMA support

Timing and Control

  • Two 6-ch. and one 2-ch., 16-bit low-power timer PWM modules with DMA support
  • 2-ch. 32-bit periodic interrupt timer provides time base for RTOS task schedule or trigger source for ADC conversion
  • Low-power timer allows operation in all power modes except for VLLS0
  • Real-time clock with calendar

Human-Machine Interface

  • Segment LCD interface
  • Capacitive touch-sensing inputs support up to 16 external electrodes and DMA data transfer
  • GPIO with pin interrupt support, DMA request capability and other pin control options

Connectivity and Communications

    • USB 2.0 On-The-Go (full-speed) with integrated USB low-voltage regulator supplies up to 120 mA off-chip at 3.3 volts to power external components from 5-volts input or USB 2.0 Device (full-speed) with clock recovery feature without the need of external crystal
    • Two I2C with DMA support, up to 1Mbps and compatible with SMBus V2 features
    • One LPUART and two UART with DMA support
    • Two SPI with DMA support
    • I2S module for audio applications
    • FlexIO for universal or customized serial peripheral emulation
    • High accuracy internal clock reference to support high-performance communication

MCUXpresso Software and Tools

MCUXpresso

Kinetis Power Estimation Tool

Kinetis Power Estimation Tool

Estimate and optimize your system's power consumption quickly with the Kinetis Power Estimator Tool.

Design Resources

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